High-reliability valve components, custom actuators, and precision bonnet hardware calibrated for demanding fluid systems in Spain and across the European Union.
Understanding the technical demands of petrochemical hubs, LNG regasification complexes, and clean hydrogen corridors across the Iberian Peninsula.
Spain stands as one of Southern Europe’s most dynamic hubs for petrochemical refining, green energy innovation, and maritime engineering. From the major chemical complexes in Tarragona (Catalonia) and Huelva (Andalusia) to the heavy manufacturing and valve production corridors of the Basque Country (País Vasco), industrial facilities demand valve bonnets engineered with absolute structural integrity.
As the primary boundary component sustaining internal fluid pressure and housing the stem sealing mechanism, a valve bonnet must withstand intense mechanical stress, cyclic thermal shocks, and aggressive chemical media. Sichuan Yining Machinery Equipment Co., Ltd. serves as an expert OEM manufacturing partner, delivering custom-forged and precision-machined valve bonnets compliant with European Pressure Equipment Directive (PED 2014/68/EU) and EN 12516 pressure design norms.
Whether required for new pipeline buildouts, maintenance turnaround in Repsol, Cepsa, or BP Castellón refineries, or municipal desalination facilities managed by Acuamed, our OEM bonnet manufacturing services ensure zero-defect geometry, robust pressure retention, and extended operational service life.
From standard bolted designs to extreme-condition pressure seal and cryogenic extended bonnets, we deliver tailored forging and CNC finishing for global valve builders.
The industry benchmark for industrial gate, globe, check, and ball valves across Spanish municipal and chemical utilities. Engineered with precision-machined gasket seating faces (RF, RTJ, tongue-and-groove) to guarantee zero leakage under thermal cycling.
Engineered for high-pressure, high-temperature service in power generation and steam distribution. The internal pressure forces the bonnet tighter against the wedge gasket, enhancing the seal as system pressure increases.
Specially fabricated with extended gas columns in accordance with BS 6364 and MSS SP-134. Traps boiled-off cryogenic gas below the packing gland to keep stem seals above freezing temperatures during LNG operation.
| Bonnet Type | Primary Industrial Application in Spain | Applicable Material Grades | Pressure / Temperature Envelope | International Standard Reference |
|---|---|---|---|---|
| Bolted Bonnet (BB) | Chemical refining (Tarragona), Water distribution, Petrochemical transfer | A105N, LF2, F304/304L, F316/316L | PN16 – PN160 / -29°C to +425°C | EN 12516-1, ASME B16.34, API 600 |
| Pressure Seal Bonnet (PSB) | Thermal Power Plants, Combined-Cycle Turbines, High-Pressure Steam | ASTM A182 F11, F22, F91, F92, A105 | Class 900 – 4500 / Up to +650°C | ASME B16.34, EN 12952, DIN 3840 |
| Extended Cryogenic Bonnet | Enagás LNG Terminals, Cryogenic Bunkering at Port of Algeciras | ASTM A182 F304L, F316L, Monel 400 | Class 150 – 1500 / Down to -196°C | BS 6364, MSS SP-134, ISO 28921 |
| Bellows Seal Bonnet | Toxic chemical processing, Green Hydrogen transport, Thermal Oil systems | Forged Carbon Steel, 17-4PH, Inconel 625 Bellows | Hermetic Zero-Emission / ISO 15848-1 | TA-Luft, API 602, EN ISO 15848 |
| Welded Bonnet (WB) | Compact high-pressure offshore installations & hazardous gas lines | ASTM A105, F316, Alloy 20, Duplex F51 | Class 800 – 2500 / -46°C to +538°C | API 602, BS 5352, EN 10222 |
European valve manufacturers and Spanish EPC contractors operating under strict CE PED regulations require full chemical and mechanical certification. Every valve bonnet produced at Sichuan Yining Machinery Equipment Co., Ltd. is supplied with EN 10204 3.1 inspection certification and complete heat traceability.
Our foundry and forging partners adhere to tight chemistry controls, optimizing tensile strength, Charpy V-notch impact toughness (down to -196°C for cryogenic bonnet extensions), and resistance to stress corrosion cracking (SCC) in marine and coastal Spanish environments.
Sichuan Yining Machinery Equipment Co., Ltd. was established in 2005 and is a company specializing in the production and manufacturing of various types of valves and finished valve accessories. Over the years, we have been dedicated to the field of valves and are committed to providing high-quality and high-performance products and solutions to customers worldwide.
The company has always adhered to the business philosophy that "Quality is the boss, quality is our salary", insisting on taking quality as the core and regarding stable and reliable product quality as the solid foundation for long-term cooperation with customers. We are well aware that high-quality products and stable delivery capabilities are the keys to the continuous development of an enterprise.
The company has passed the ISO9001 quality management system certification and CE certification, and strictly follows international standards for production and quality control to ensure that every product meets industry and customer requirements.
With years of manufacturing experience and mature production techniques, we have a professional technical and management team with rich theoretical knowledge and practical experience. We adhere to the development direction of "conceptual innovation, technological innovation, and management innovation", constantly improving product quality and enterprise competitiveness.
In the future, Sichuan Yining Machinery Equipment Co., Ltd. will continue to take outstanding quality as the core, customer demands as the orientation, and join hands with partners to create a long-term, stable and mutually beneficial win-win cooperative relationship.
Our workshop floor is outfitted with heavy-duty turning centers, multi-axis CNC machines, and high-precision threading equipment specifically configured for valve bonnet packing chambers, bolt patterns, and gasket grooves.
Our company is CE certified and operates under an ISO 9001 quality management system. We are equipped with CNC machines, machining centers, forging and cold forming equipment, as well as physical and chemical testing facilities.
Our valve components are manufactured in accordance with GB, ANSI, JIS, DIN, and BS standards, meeting the conformity requirements of international markets, including Europe.
We machine carbon steel, stainless steel, alloy steel, and special materials such as 410, 420, F304, F316, LF2, A105, 17-4PH, Monel 400, and XM-19, and support custom production based on customer drawings.
In addition to comprehensive product supply, our service level is also outstanding. With rich experience in the industry, we are always able to deeply understand the needs of our customers and meet all kinds of OEM customisation requirements. We ensure on-time delivery, prompt response and take care of all after-sales issues.
Addressing technical, regulatory, metallurgical, and logistics questions from Spanish valve manufacturers, EPC contractors, and maintenance engineers.
All our forged and machined valve bonnets intended for European and Spanish delivery are manufactured under an ISO 9001 quality framework and adhere to harmonized standards such as EN 12516 and EN 10222. Full material traceability, EN 10204 3.1 inspection certificates, hydrostatic test logs, and PMI chemical verification are supplied with each shipment.
We machine custom bolted bonnets, welded seal caps, pressure seal bonnets for power stations, cryogenic extension necks according to BS 6364, and bellows housing bonnets for fugitive emission control. Our multi-axis CNC machines maintain tight tolerances (up to ±0.005mm) across bolt circle diameters, packing bore finishes, and RTJ gasket seating grooves.
For reverse osmosis (SWRO) projects along the Spanish Mediterranean coast (e.g., Alicante, Murcia, Almería, and the Balearic Islands), we supply valve bonnets machined from Duplex 2205 (UNS S31803 / 1.4462), Super Duplex 2507 (UNS S32750 / 1.4410), and Super Austenitic 254 SMO (1.4547), ensuring high PREN values and immunity to crevice corrosion.
Standard prototype samples and custom pre-series bonnets are typically machined within 2 to 3 weeks following drawing approval. Volume production runs are shipped directly to major Spanish commercial ports (Valencia, Barcelona, Bilbao, and Algeciras) via sea freight, or via expedited air freight (Madrid-Barajas / Barcelona-El Prat) for urgent project outages.
Yes. We specialize in precision micro-finishing (Ra 0.4 to Ra 0.8 µm) for stem bores and packing stuffing boxes, which is vital for meeting Class AH and BH fugitive emission limits. We also manufacture extended bellows housing bonnets engineered with multi-ply hydroformed Inconel or stainless steel bellows for zero-emission toxic chemical processing.
Depending on client specifications and European project requirements, we conduct Ultrasonic Testing (UT) to detect internal forging voids, Magnetic Particle Testing (MT) for ferromagnetic steels, Liquid Penetrant Testing (PT) for stainless/duplex welds, Positive Material Identification (PMI), and 3D CMM dimensional verification.
Explore our full catalog of precision-machined valve bodies, stems, seats, brackets, couplings, and integrated flow control assemblies engineered to international standards.
Sichuan Yining Machinery Equipment Co., Ltd. is committed to becoming a trusted partner of global valve companies. Contact our engineering team today for technical consultations, customized bonnet RFQs, and rapid project quotes for the Spanish market.
+86-15208308717